As I've recently been repairing a few Switches I thought it might be worth documenting my repairs related to the motherboard (I'll also add any Joycon repairs here).
If anyone wants to add any of their own repairs feel free to do so.
Note: this is largely related to repairs involving microsoldering so you need the skills and the equipment to do this (and a steady hand plus some patience).
Repair #1 - Switch won't charge via the power adapter or the dock (the dock LED will usually turn on then off - so no HDMI output either)
Fix: This is usually caused by a damaged USB C port (also referred to as the charging port) - the USB C port needs to be replaced. This is a common point of failure on the Switch; I've now repaired quite a number of Switches with this issue
Repair #2 - Switch starts to power up and displays the Nintendo logo, then the screen goes blank (as it should) but it should then go on to display the Switch logo - this doesn't happen. This can sometimes be worked around by disconnecting and reconnecting the battery and going into maintenance mode the exiting but this has to be done after every reset or power cycle - in short, it's totally impractical so the cause needs to be addressed
Fix: Replace faulty BQ24103 chip - this is located near the battery connector. Thanks to mattytrog for stating that this chip was the cause
Repair #3 - Switch won't power on
Fix: This can be caused by all manner of faults, included a bricked Switch. However, a common hardware failure, particularly if a non-official docking station has been used, is the M92T36 chip. This is located a above the USB C connector
Repair #4 - Switch doesn't appear to power but after a few seconds it's noticed that the touchscreen is working as sounds can be heard as the display is used normally - shining a strong torch onto the display reveals very faint images
Fix: The backlight has failed. I've only seen this happen once so far and the cause was a tiny spot of corrosion on the connector which the backlight's 4-pin Flat Flex Cable plugs into (just above the right speaker (left speaker of course if you're looking inside the Switch with the back off)). Cleaning the corrosion fixed the fault and the backlight worked again
Repair #5 - Switch touchscreen not working
Fix: The touchscreen is handled by the small daughterboard which also contains the game cart slot and the audio jack socket. In this case there was some corrosion on the the Flat Flex Cable connector - cleaning this with some Isopropyl Alcohol fixed the fault
Repair #6 - Switch powers on but after the Nintendo logo has been displayed the display blanks then nothing - prior to this the Switch was powering on okay but refused to charge the battery, after a while though it got into this state of only displaying the Nintendo logo then blanking the display
Fix: I thought at first that this was caused by a faulty BQ24103 chip but replacing that changed nothing. Did some poking around the battery connector and there was no continuity between pin 3 and the track that connects to it. I then found an extremely tiny bit of corrosion which had eaten through the track from pin 3 (I guess this is some kind of sense line?). Fixing the track fixed both problems and the Switch booted normally and charged the battery
Repair #7 – The Switch will charge but not the Joycons
Fix: Faulty M92T36 replaced
Repair #8 - Video and audio is fine in handheld mode but when docked there's no video (only audio) on the TV or monitor
Fix: Replaced faulty PI3USB chip
Repair #9 - Switch powers on, Nintendo logo appears, screen clears .......... so far so good. The Switch logo then appears but stays onscreen for less time than usual, screen clears again (as it should) then nothing. Just a blank display
Fix: Faulty M92T36 replaced
Repair #10 - Switch powers on, Nintendo logo appears, screen clears ......... so far so good. However, it then takes longer than usual for the Switch logo to appear and when it does that's it, the Switch logo stays onscreen and nothing further happens
Fix: Faulty M92T36 replaced
Repair #11 - The Switch powers on, displays the Nintendo Logo, screen blanks (as it should) then the Switch logo briefly appears and immediately goes off, only for an error to be reported:
2101-0001
the error display states to press the power button to restart or to hold it down for 12 seconds to power off the Switch. If the problem persists the display states that the user should refer to the Nintendo support website
Fix: Replace faulty M92T36
If any other repairers would like to add their findings to this thread please do so
If anyone wants to add any of their own repairs feel free to do so.
Note: this is largely related to repairs involving microsoldering so you need the skills and the equipment to do this (and a steady hand plus some patience).
Repair #1 - Switch won't charge via the power adapter or the dock (the dock LED will usually turn on then off - so no HDMI output either)
Fix: This is usually caused by a damaged USB C port (also referred to as the charging port) - the USB C port needs to be replaced. This is a common point of failure on the Switch; I've now repaired quite a number of Switches with this issue
Repair #2 - Switch starts to power up and displays the Nintendo logo, then the screen goes blank (as it should) but it should then go on to display the Switch logo - this doesn't happen. This can sometimes be worked around by disconnecting and reconnecting the battery and going into maintenance mode the exiting but this has to be done after every reset or power cycle - in short, it's totally impractical so the cause needs to be addressed
Fix: Replace faulty BQ24103 chip - this is located near the battery connector. Thanks to mattytrog for stating that this chip was the cause
Repair #3 - Switch won't power on
Fix: This can be caused by all manner of faults, included a bricked Switch. However, a common hardware failure, particularly if a non-official docking station has been used, is the M92T36 chip. This is located a above the USB C connector
Repair #4 - Switch doesn't appear to power but after a few seconds it's noticed that the touchscreen is working as sounds can be heard as the display is used normally - shining a strong torch onto the display reveals very faint images
Fix: The backlight has failed. I've only seen this happen once so far and the cause was a tiny spot of corrosion on the connector which the backlight's 4-pin Flat Flex Cable plugs into (just above the right speaker (left speaker of course if you're looking inside the Switch with the back off)). Cleaning the corrosion fixed the fault and the backlight worked again
Repair #5 - Switch touchscreen not working
Fix: The touchscreen is handled by the small daughterboard which also contains the game cart slot and the audio jack socket. In this case there was some corrosion on the the Flat Flex Cable connector - cleaning this with some Isopropyl Alcohol fixed the fault
Repair #6 - Switch powers on but after the Nintendo logo has been displayed the display blanks then nothing - prior to this the Switch was powering on okay but refused to charge the battery, after a while though it got into this state of only displaying the Nintendo logo then blanking the display
Fix: I thought at first that this was caused by a faulty BQ24103 chip but replacing that changed nothing. Did some poking around the battery connector and there was no continuity between pin 3 and the track that connects to it. I then found an extremely tiny bit of corrosion which had eaten through the track from pin 3 (I guess this is some kind of sense line?). Fixing the track fixed both problems and the Switch booted normally and charged the battery
Repair #7 – The Switch will charge but not the Joycons
Fix: Faulty M92T36 replaced
Repair #8 - Video and audio is fine in handheld mode but when docked there's no video (only audio) on the TV or monitor
Fix: Replaced faulty PI3USB chip
Repair #9 - Switch powers on, Nintendo logo appears, screen clears .......... so far so good. The Switch logo then appears but stays onscreen for less time than usual, screen clears again (as it should) then nothing. Just a blank display
Fix: Faulty M92T36 replaced
Repair #10 - Switch powers on, Nintendo logo appears, screen clears ......... so far so good. However, it then takes longer than usual for the Switch logo to appear and when it does that's it, the Switch logo stays onscreen and nothing further happens
Fix: Faulty M92T36 replaced
Repair #11 - The Switch powers on, displays the Nintendo Logo, screen blanks (as it should) then the Switch logo briefly appears and immediately goes off, only for an error to be reported:
2101-0001
the error display states to press the power button to restart or to hold it down for 12 seconds to power off the Switch. If the problem persists the display states that the user should refer to the Nintendo support website
Fix: Replace faulty M92T36
If any other repairers would like to add their findings to this thread please do so
Last edited by WadsRUs,